PMID- 28501485 OWN - NLM STAT- MEDLINE DCOM- 20171127 LR - 20180126 IS - 1618-131X (Electronic) IS - 1438-4639 (Linking) VI - 220 IP - 4 DP - 2017 Jun TI - Rapid genotyping of Legionella pneumophila serogroup 1 strains by a novel DNA microarray-based assay during the outbreak investigation in Warstein, Germany 2013. PG - 673-678 LID - S1438-4639(16)30006-2 [pii] LID - 10.1016/j.ijheh.2016.02.004 [doi] AB - Between 1 August and 6 September 2013, an outbreak of Legionnaires' disease (LD) with 78 cases confirmed by positive urinary antigen tests occurred in Warstein, North Rhine-Westphalia, Germany. Legionella (L.) pneumophila, serogroup (Sg) 1, monoclonal antibody (mAb) subgroup Knoxville, sequence type (ST) 345, was identified as the epidemic strain. This strain was isolated from seven patients. To detect the source of the infection, epidemiological typing of clinical and environmental strains was performed in two consecutive steps. First, strains were typed by monoclonal antibodies. Indistinguishable strains were further subtyped by sequence-based typing (SBT) which is the internationally recognized standard method for epidemiological genotyping of L. pneumophila. In an early stage of the outbreak investigation, many environmental isolates were found to belong to the mAb subgroup Knoxville, but to two different STs, namely to ST 345, the epidemic strain, and to ST 600. A majority of environmental isolates belonged to ST 600 whereas the epidemic ST 345 strain was less common in environmental samples. To rapidly distinguish both Knoxville strains, we applied a novel typing method based on DNA-hybridization on glass chips. The new assay can easily and rapidly discriminate L. pneumophila Sg 1 strains. Thus, we were able to quickly identify the sources harboring the epidemic strain, i.e., two cooling towers of different companies, the waste water treatment plants (WWTP) of the city and one company as well as water samples of the river Wester and its branches. CI - Copyright (c) 2016 Elsevier GmbH. All rights reserved. FAU - Petzold, Markus AU - Petzold M AD - Institute of Medical Microbiology and Hygiene, German Reference Laboratory for Legionella, Dresden University of Technology, Fetscherstrasse 74, 01307 Dresden, Germany. Electronic address: markus.petzold@tu-dresden.de. FAU - Ehricht, Ralf AU - Ehricht R AD - Alere Technologies GmbH, Lobstedter Strasse 103-105, 07749 Jena, Germany. Electronic address: ralf@clondiag.com. FAU - Slickers, Peter AU - Slickers P AD - Alere Technologies GmbH, Lobstedter Strasse 103-105, 07749 Jena, Germany. Electronic address: piet@clondiag.com. FAU - Pleischl, Stefan AU - Pleischl S AD - Institute for Hygiene and Public Health, University of Bonn, Sigmund-Freud-Strasse 25, 53105 Bonn, Germany. Electronic address: stefan.pleischl@ukb.uni-bonn.de. FAU - Brockmann, Ansgar AU - Brockmann A AD - Regional Public Health Department Soest, Mastholter Strasse 230, 59558 Lippstadt, Germany. Electronic address: ansgar.brockmann@kreis-soest.de. FAU - Exner, Martin AU - Exner M AD - Institute for Hygiene and Public Health, University of Bonn, Sigmund-Freud-Strasse 25, 53105 Bonn, Germany. Electronic address: martin.exner@ukb.uni-bonn.de. FAU - Monecke, Stefan AU - Monecke S AD - Institute of Medical Microbiology and Hygiene, German Reference Laboratory for Legionella, Dresden University of Technology, Fetscherstrasse 74, 01307 Dresden, Germany; Alere Technologies GmbH, Lobstedter Strasse 103-105, 07749 Jena, Germany. Electronic address: stefan.monecke@clondiag.com. FAU - Luck, Christian AU - Luck C AD - Institute of Medical Microbiology and Hygiene, German Reference Laboratory for Legionella, Dresden University of Technology, Fetscherstrasse 74, 01307 Dresden, Germany. Electronic address: christian.lueck@tu-dresden.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160222 PL - Germany TA - Int J Hyg Environ Health JT - International journal of hygiene and environmental health JID - 100898843 SB - IM MH - Disease Outbreaks MH - Genotype MH - Germany/epidemiology MH - Humans MH - Legionella pneumophila/*genetics/isolation & purification MH - Legionnaires' Disease/epidemiology MH - Oligonucleotide Array Sequence Analysis MH - Serogroup OTO - NOTNLM OT - Cooling tower OT - DNA-microarray typing OT - Legionella pneumophila serogroup 1 OT - Legionnaires' disease OT - Molecular epidemiology OT - Outbreak EDAT- 2016/02/22 00:00 MHDA- 2017/11/29 06:00 CRDT- 2017/05/15 06:00 PHST- 2015/12/11 00:00 [received] PHST- 2016/02/12 00:00 [revised] PHST- 2016/02/12 00:00 [accepted] PHST- 2016/02/22 00:00 [pubmed] PHST- 2017/11/29 06:00 [medline] PHST- 2017/05/15 06:00 [entrez] AID - S1438-4639(16)30006-2 [pii] AID - 10.1016/j.ijheh.2016.02.004 [doi] PST - ppublish SO - Int J Hyg Environ Health. 2017 Jun;220(4):673-678. doi: 10.1016/j.ijheh.2016.02.004. Epub 2016 Feb 22.